3-PH Pad Mount


Three-Phase Liquid filled Pad-Mount

TTES produces Fluid Type Mineral oil, as well as Envirotemp™ FR3™ fluid, three-phase pad transformers. These transformers boast a versatile Primary Voltage range of 2,400 to 46,000 V, coupled with a Secondary Voltage range spanning from 208Y/120 V to 14,400 V. Notably, our transformers are equipped with essential features such as Vacuum Fault Interrupter and Differential Protection, ensuring optimal performance and safety.



Primary voltage

2400-46,920 V

Secondary Voltage

208Y/120 V to 14,400 V

Our expertise

Reliable transformer industry leader in the USA

The fastest delivery speed, complemented by exceptionally detailed drawings and a seamless production process establishes our reputation as an industry leader in the USA.

Fastest delivery time

Competitive price

2 years warranty

Swift process

More about transformers

How Does a Three Phase Transformer Work?

A three phase transformer works by transferring electrical energy between three different circuits using electromagnetic induction. It consists of three sets of primary and secondary windings, each connected in a delta (Δ) or wye (Y) configuration. When an alternating current is applied to the primary windings, it creates a changing magnetic field within the transformer’s core. This magnetic field then induces a voltage in the secondary windings, allowing for the transfer of electrical energy from the primary to the secondary circuits.
The three phase system allows for more efficient power transmission and distribution, as it provides a constant and smooth flow of power. The transformer can step up or step down the voltage levels to match the requirements of the different circuits. Overall, a three phase transformer facilitates the distribution of electrical power to industrial and commercial applications and is an essential component in electrical power systems. 

Components of a Three Phase Transformer

A three-phase transformer consists of several key components that work together to facilitate the transformation of electrical energy between three-phase systems. Here are the main components:
  1. Core: The core is typically made of laminated iron or steel sheets and serves as the magnetic circuit of the transformer. It provides a low-reluctance path for the magnetic flux generated by the primary winding.
  2. Windings:
    • Primary Windings: These windings receive the incoming three-phase alternating current (AC) from the power source.
    • Secondary Windings: These windings deliver the transformed three-phase AC to the load. The turns ratio between the primary and secondary windings determines the voltage transformation.
  3. Insulation System: Insulation materials are used to separate the windings and the core, preventing electrical breakdown and ensuring the safety and reliability of the transformer.
  4. Tap Changer: A tap changer is a device that allows adjustments to the turns ratio of the transformer. This enables fine-tuning of the output voltage to account for variations in the input voltage or load conditions.
  5. Cooling System: Transformers generate heat during operation, and a cooling system is essential to dissipate this heat and maintain optimal operating temperatures. Common cooling methods include oil cooling, air cooling, or a combination of both.
  6. Tank: The tank encloses the core and windings, providing mechanical support and serving as a container for the transformer’s insulating oil. It also protects the internal components from environmental factors.
  7. Bushings: Bushings are insulating devices that provide a means for connecting external conductors to the internal windings of the transformer. They ensure proper insulation and electrical isolation.
  8. Breather: A breather is a device that prevents moisture from entering the transformer by absorbing the moisture present in the air. It helps maintain the insulating properties of the transformer oil.
  9. Conservator: Some transformers include a conservator, which is a tank connected to the main tank by a pipe. It accommodates changes in oil volume due to temperature variations and protects the transformer oil from contact with air.
  10. Winding Insulation: Insulating materials are used between the individual turns of the windings to prevent electrical breakdown and ensure the integrity of the transformer.

Applications of Three Phase Transformers

  1. Power Distribution: Three-phase transformers are commonly used in power distribution systems to step up or step down voltage levels. They help transmit electrical power efficiently over long distances.
  2. Industrial Applications: Industries often require a large amount of power, and three-phase transformers are used to supply electricity to various equipment and machinery. They are commonly found in manufacturing plants, refineries, and other industrial settings.
  3. Commercial Buildings: Three-phase transformers are used in commercial buildings for distributing power to elevators, air conditioning systems, lighting, and other electrical loads. They help ensure a reliable and efficient power supply.
  4. Renewable Energy: In the context of renewable energy sources like wind and solar power, three-phase transformers are used to connect the generated power to the electrical grid. They help match the voltage levels for proper integration.
  5. Electric Traction: Three-phase transformers play a vital role in electric traction systems, such as those used in trains and electric vehicles. They help convert and manage power for efficient transportation.
  6. Data Centers: Data centers require a large amount of power for their servers and equipment. Three-phase transformers are used to distribute power within these facilities, ensuring a stable and reliable power supply.
  7. Mining Operations: In mining, where heavy machinery and equipment are used, three-phase transformers are employed to provide the necessary power for operations. They contribute to the efficiency and reliability of mining activities.